I have written various issues, let's go to the basic - which should be my first
Food are define as anything, everything that can be consumed, eating and drinking, as long is edible and for Muslim - must be halal. While the objective is to provide energy and maintenance of body.
There are plenty of food in this world, a normal one would be fish and seafood, beef and lamb, poultry, birds and games, vegetarian food for vegan. Under special category of exotics like Korean with their dogs meat, Japanese with their Puff's fish; despite known poisonous, others are caviar, frog's legs (available at Ampang wet market), turtles soups, alligator meat, kangaroo and ostrich, and sometimes insects and rodents.
So, which one you like to have?